The dramatic weight loss was needed to play HIV-positive Ron Woodruff in the upcoming film "Dallas Buyers Club."

"I'm eating fresh fish. I'm just eating small amounts. I'm not being starved," said the actor, who also says he's sleeping well. "If anything, it's as much a spiritual journey as it is physical."

I don't know. You see a lot of big beefy people in church.

Though his body's "fine," McConaughey says, "Everything has shrunk quite a bit. ... I don't have the leverage I used to. I have body soreness. But I'm as healthy as can be. My blood pressure, everything's fine."

Everything shrunk? Uh ...

McConaughey said getting back to his normal weight will be tricky, as he risks getting a form of diabetes.